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Andreas Rheinhardt 425b309fa4 avcodec/wrapped_avframe: Don't leak frame metadata, side-data 
wrapped_avframe_decode() uses an AVFrame as dst in av_frame_move_ref()
after having called ff_decode_frame_props() to attach side-date
to this very frame. This leaks all the side-data and metadata
that ff_decode_frame_props() has attached.

This happens in various fate-filter-metadata tests since
6ca43a9675d651d7ea47c7ba2fafb1bf831c4d0b.

These particular leaks (which affect metadata-only)
could be fixed by not adding metadata side-data to AVPackets
in libavdevice if they are also available from the AVFrames.
Yet this would break users that extract the metadata from
AVPackets.

The changes to FATE happen because of the way av_dict_set()
works when it overwrites an already existing entry:
It overwrites the entry to be overwritten with the last entry
and adds the new entry at the end. The end result is that
the first entry of the dict is the second-to-last-entry of
the original dict, the last entry of the dict is the last
entry of the old dict and the first count - 2 entries
of the original dict are at positions 1..count - 2 in their
original order.

Reviewed-by: Timo Rothenpieler <timo@rothenpieler.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-07-18 21:09:44 +02:00
compat avfilter: add chromakey_cuda filter 2022-07-10 17:20:15 +02:00
doc avfilter: add vsrc_ddagrab 2022-07-18 02:08:27 +02:00
ffbuild ffbuild/common: Fix CPPFLAGS applied for compiling C++ files 2022-05-24 21:30:52 +02:00
fftools fftools/ffmpeg: make debug_ts print raw filter output 2022-07-18 00:32:14 +02:00
libavcodec avcodec/wrapped_avframe: Don't leak frame metadata, side-data 2022-07-18 21:09:44 +02:00
libavdevice avdevice/lavfi: pass forward video framerate 2022-07-18 00:32:57 +02:00
libavfilter avfilter/vsrc_ddagrab: fix checkheaders error 2022-07-18 13:08:39 +02:00
libavformat avformat/mov: discard data streams with all zero sample_delta 2022-07-18 11:06:17 +08:00
libavutil avutil/hwcontext_d3d11va: add BGRA/RGBA10 formats support 2022-07-18 00:32:14 +02:00
libpostproc Bump versions after 5.1 branch 2022-07-13 00:29:05 +02:00
libswresample Bump versions after 5.1 branch 2022-07-13 00:29:05 +02:00
libswscale Bump versions after 5.1 branch 2022-07-13 00:29:05 +02:00
presets
tests avcodec/wrapped_avframe: Don't leak frame metadata, side-data 2022-07-18 21:09:44 +02:00
tools tools/target_dec_fuzzer: adjust threshold for flic 2022-07-12 21:55:22 +02:00
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.gitignore gitignore: add config_components.h 2022-03-17 18:35:41 -03:00
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Changelog Changelog: move ddagrab addition to correct version 2022-07-18 13:52:48 +02:00
configure avfilter: add vsrc_ddagrab 2022-07-18 02:08:27 +02:00
CONTRIBUTING.md
COPYING.GPLv2
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INSTALL.md
LICENSE.md
MAINTAINERS MAINTAINERS: add myself as maintainer for LoongArch. 2022-06-08 18:29:30 +02:00
Makefile Makefile: Prompt for reconfigure on lavc/hwaccels.h modification 2022-07-01 00:34:38 +02:00
README.md
RELEASE RELEASE: update after 5.1 branch 2022-07-13 00:31:42 +02:00

README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides means to alter decoded audio and video through a directed graph of connected filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libswresample implements audio mixing and resampling routines.
  • libswscale implements color conversion and scaling routines.

Tools

  • ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
  • ffplay is a minimalistic multimedia player.
  • ffprobe is a simple analysis tool to inspect multimedia content.
  • Additional small tools such as aviocat, ismindex and qt-faststart.

Documentation

The offline documentation is available in the doc/ directory.

The online documentation is available in the main website and in the wiki.

Examples

Coding examples are available in the doc/examples directory.

License

FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.

Contributing

Patches should be submitted to the ffmpeg-devel mailing list using git format-patch or git send-email. Github pull requests should be avoided because they are not part of our review process and will be ignored.